现在进行时、过去进行时、一般将来时、现在完成时 英语主动语态变被动语态例句

I am watching TV.-现在进行时
I was reading at that time.-过去进行时
He will go to school.-一般将来时
I have studied English since 1985.-现在完成时
They built this bridge.-主动句 This bridge was built by them.-被动句

现在进行时、He is cleaning the room now.The room is being cleaned by him now.
过去进行时 He was cleaning the room then. The room was being cleaned by him then.
一般将来时、He will clean the room soon.The room will be cleaned by him soon .
现在完成时He has cleaned the room .The room has been cleaned by him .

现在进行时
I am writing a book.
The book is being written by me.

过去进行时
She was doing her homework.
Her homework was being done.

一般将来时
We will built a house.
A house will be built.

现在完成时
They have come up with a question at the meeting.
A question has been come up with at the meeting.